Wrap vim autocmd inside augroups

.config/vim/ftplugin/tex.vim

@@ -21,4 +21,6 @@ noremap <F7> <Esc>:setlocal spell spelllang=en_us,nl<CR>
 noremap <F8> <Esc>:setlocal nospell<CR>
 
 " Start spell check when vim is run
-autocmd VimEnter * call feedkeys("\<F7>")
+augroup SpellCheck
+	autocmd! VimEnter * call feedkeys("\<F7>")
+augroup END

.config/vim/vimrc

@@ -93,10 +93,14 @@ let g:vimtex_view_method = 'zathura'
 "" Autocommands
 
 " Remove trailing whitespace in the following filetypes
-autocmd FileType c,cpp,ino,java,py,php,sh,tex autocmd BufWritePre <buffer> %s/\s\+$//e
+augroup TrailingWhitespace
+	autocmd! FileType c,cpp,ino,java,py,php,sh,tex autocmd BufWritePre <buffer> %s/\s\+$//e
+augroup END
 
 " Close vim if only window is NERD Tree
-autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
+augroup CloseVimTree
+	autocmd! bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
+augroup END
 
 "" Functions